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C- A. MUDDHVIAN. HOTWATER BOILER 0R TANK. APPLICATION FILED MAY 22, I920.

Patented Oct. 12,1920.

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BOILER 0R TANK.

., 7 oom lli v Specification of Letters Patent.

Patented Oct, 12, 1920:

Application filed May 22, 1920. Serial No. 383,584.

T0 aZZ "whom it may concern:

Be it known that 1, CHARLES A. iconi- MAN. a citizen of the United States, and resident oit Washington, District of Columbia, have invented certain new and useful linprovements in Hotater Boiler orflanks, of which the following is a specification.

My invention relates to hot water boilers or tanks, and more particularly to boilers or tanks having a heat insulating jacket thereon, and has for one of its principal objects the provision of such an insulating jacket having a higher eiliciency than any heretofore known.

7 Another object is to provide an insulating jacket hat may be put on the boilers at the factory a shipped without being damaged.

Another and very important object is to provide an insulating jackethaving a plurality of comparatively small air cells, thereby preventing; the circulation oi any great amount of wlen heated.

" er object is the provision of iet that will coznlmne cheapid durability, in a structure 1 high eiiiciency.

Herctofore it has been the practice to insulate boilers "i on the job, that is, after they were installed, and this practice has led to poor insulations due to the fact that the workmen were careless or inexperienced, and also caused much inconvenience to the occupants of the premises where the boiler was installed. by the use of the insulating IlllK- tures. However, the practice of insulating the boilers on the premises was a necessary evil. since no insulation was known that was not too fragile to stand shipping. it has also been the practice to apply the insulation directly to or against the boiler, and while this \VltS much better than no insulation at all. it was not a perfect insulation, and had a tendency to become loosened due to the expansion and contraction of the boiler and the sweating thereof, and also due to the fact that it could not orope adhere to the smooth boiler surface.

All oi the above disadvantages and evils have been overcome by my invention. The insulating casing may be applied at the "factory and shipped without danger breaking the construction shown provides-a plurality of dead air chambers between the I-asing; and the boiler 'all, toereby creating a perfect insulation, and the casing is spaced away from the boiler wall and provided with a mesh base, thereby forming an ideal lock for the fibrous insulating material.

The above and other objects and advantages will be more fully described in the fole0 lowing specification, and illustrated in the accompanying drawings, in. which- I Figure l is a side elevation showing my improved insulating); casing applied toa boiler. -65

Fig. 2 is a side elevation with the several parts of the casing" broken away to show the structure thereof.

Fig. 3 is a top plan view of a boiler constructed in accordancewith my invention, 7. with the insulating casing removed to show the strips that support it.

1 Fig. 4 is a bottom plan view of a boiler having a portion of the insulating casing broken away.

Referring particularlyto the drawings, the numeral 2 designates the boiler which 'ia'y be of any desired and well-known construction.

A plurality of vertical strips or ribs 3 and horizontal strips or ribs at oi non-heat absorbing, and non-combustible material such as asbestos board, are secured to and spaced around the periphery of the boiler in such a manner as to form a checker-work of cells or spaces 5. Other strips or ribs ti are secured to and spaced in spoke-like formation on the top and bottom faces of the boiler forming other cells or spaces 7.

A mesh base 8 which may be expanded metal, wire mesh, or the like, is mounted over the strips 3, 4;, and 6, forming a surrounding perforated wall around the tank or boiler 2.

A non-heat absorbing and non-combustible plaster, such asbestos plaster, is applied over the base 8, care being taken to force it through the mesh, thus keying or locking it in place, and a suiiicient amount is applied to form a casing 9 about one 100 inch in thickness.

litter the casing 9 has been applied and while is still in a plastic state, a canvas or other textile covering 10 is applied over and forced into the casing so that it be- 105 comes impregnated therewith and adheres thereto.

After the casing 9 has hardened, the whole structure will be an integral and solid mass, having the dead air spaces or cells 5' 110 between the inner well of the casing 9 and the outer periphery of the boiler, and will 'be of sufficient strength to Withstand the shocks received in shipping or transporting the boilers from place to place.

Any expansion and contraction of the metal boiler-2.01 sweating of its walls will in nowise affect the casing, due to the air cells 5.

While I have shown and described but one embodiment of my invention in combination with a hot water boiler or tank, it Will be understood that I do not wish to be limited to such a combination, since various uses may be found for my improved casing, such as applying it to furnaces or other heat "supplying means.

Various minor changes and modifications in structure and combination of parts will readily suggest themselves to those skilled in the art, and, therefore, I wish it expressly understood that such minor changes and modifications may be made Without departing from the spirit of my invention as described in the appended claims.

I'Vhat I claim is- 1. In combination With a receptacle, an msulatmg caslng,

comprising a plurality of rib members spaced apart on the outer surface of said receptacle forming a plurality of cell like depressions, a perforated base mounted over said ribs so as to inclose said receptacle, and a plastic, non-heat absorbing material mounted over said perforated base and secured thereto.

2. In combination With a receptacle, an insulating casing, comprising a plurality of rib members spaced apart on the outer surface of said receptacle forming a plurality of cell like depressions, a perforated base mounted over said ribs so as to inclose said receptacle, a plastic non-heat absorbing and non-combustible material mounted over said perforated base, and a textile binder mounted over and forced into said plastic composition.

3. The combinatiton with a hot water boiler having a cylindrical outline, of an insulating casing, comprising a plurality of vertical and horizontal non-heat absorbing rib members spaced around its side Walls forming a plurality of cell like depressions, other ribs spaced in spoke-like formation on the ends of said boiler, and a non-heat absorbing and non-combustible covering mounted over said ribs and inclosing said receptacle.

4. The combination with a hot Water boiler having a cylindrical outline, of an insulating casing, comprising a plurality of verticalv and horizontal non-heat absorbing rib members spaced around its side Walls forming a plurality of cell like depressions,

other ribs spaced in spoke-like formation on the ends of said boiler, a perforated base member over all of said ribs so as to entirely inclose said receptacle, a layer of plastic non-heat absorbing and non-combustible material mounted over said perforated base and secured thereto, and a textile binder mounted over, secured to, and inclosing said layer of plastic material.

In testimony whereof I have hereunto set my hand.

CHARLES A. MUDDIMAN. 

